tipc: avoid to asynchronously reset all links
Postpone the actions of resetting all links until after bclink
lock is released, avoiding to asynchronously reset all links.
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index ef8cff4..a0978d0 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -87,6 +87,7 @@
* @lock: spinlock governing access to structure
* @link: (non-standard) broadcast link structure
* @node: (non-standard) node structure representing b'cast link's peer node
+ * @flags: represent bclink states
* @bcast_nodes: map of broadcast-capable nodes
* @retransmit_to: node that most recently requested a retransmit
*
@@ -96,6 +97,7 @@
spinlock_t lock;
struct tipc_link link;
struct tipc_node node;
+ unsigned int flags;
struct tipc_node_map bcast_nodes;
struct tipc_node *retransmit_to;
};
@@ -119,7 +121,26 @@
static void tipc_bclink_unlock(void)
{
+ struct tipc_node *node = NULL;
+
+ if (likely(!bclink->flags)) {
+ spin_unlock_bh(&bclink->lock);
+ return;
+ }
+
+ if (bclink->flags & TIPC_BCLINK_RESET) {
+ bclink->flags &= ~TIPC_BCLINK_RESET;
+ node = tipc_bclink_retransmit_to();
+ }
spin_unlock_bh(&bclink->lock);
+
+ if (node)
+ tipc_link_reset_all(node);
+}
+
+void tipc_bclink_set_flags(unsigned int flags)
+{
+ bclink->flags |= flags;
}
static u32 bcbuf_acks(struct sk_buff *buf)